"Jaime Casanova" <[EMAIL PROTECTED]> writes:
> On 6/4/07, Tom Lane <[EMAIL PROTECTED]> wrote:
>> Perhaps a reasonable compromise could work like this: at the first point
>> in a transaction where a temp file is created, choose a random list
>> element, and thereafter advance cyclically for the duration of that
>> transaction.

> ok. are you doing this? or can i prepare a patch that implements this?
> i guess we can allocate the memory for the list in TopTransactionContext.

I'll work on it ... I want to rejigger the API between fd.c and
tablespace.c anyway.  (fd.c still shouldn't be calling tablespace.c ...)

                        regards, tom lane

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not

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